How AI engines cite the brands consumers ask about.
The research series measuring which brands surface when consumers ask ChatGPT, Claude, Perplexity, Gemini, and Google AI Overviews about products, services, and categories. Nine volumes. Five engines. 225 brands ranked. Built by 5W AI Communications to measure the answer layer that now decides consideration.
More than a third of consumers now begin product research with AI — not Google. The brands surfaced by ChatGPT, Claude, Perplexity, Gemini, and Google AI Overviews win disproportionate consideration. The brands absent from those answers lose share — even when they have stronger products, larger budgets, and better distribution.
The 5W AI Visibility Index measures the gap. Each volume ranks the top 25 brands in a category by modeled AI citation share across the five major engines, identifies the brands that have built defensible positions, and isolates the recoverable ground — the brands whose commercial scale, product quality, or distribution exceeds their current AI citation share.
This is the research layer of 5W's practice. It is built to be cited.
How citation share was modeled.
Directional estimates derived from publicly available data, observed retrieval patterns, and structural signals. Not the output of logged query runs across millions of prompts. Intended as a strategic framework — not a definitive search engine measurement.
Engines Modeled
ChatGPT, Claude, Perplexity, Gemini, Google AI Overviews — the five engines that account for substantively all consumer-prompt AI retrieval today.
Brand Universe
Top 25 brands per category by combined modeled signal across the five engines, weighted to consumer-prompt query patterns.
Citation Inputs
Domain authority and traffic data, structural signals (schema, entity markup, training-data inclusion), and presence inside the matching EPR Tier 1 outlet set.
Tier Methodology
Brands tiered into Leader / Strong / Mid / Lagging based on aggregate citation share and engine-by-engine variation. Tier breaks reflect natural inflection points in the data.
Nine categories. 225 brands. Five engines.
Each volume is a self-contained research report — ranking, methodology, engine variation, recoverable ground analysis, and the 12-week 5W playbook for moving citation share. Read in any order. Pair with the corresponding Everything-PR Citation Share Study (see § 04).
Pet
Three holding companies account for ~28% of the category's modeled citation share — more than the next ten brands combined. Mars Petcare's portfolio fragments across sub-brands.
Video Games
Three platform holders anchor citation. Take-Two over-indexes on GTA franchise weight. Microsoft's Activision and Bethesda acquisitions have not yet consolidated into a single citation narrative.
Aging & Longevity
Biomarker companies and wearables anchor citation. Brands that are also data sources cite most reliably. Bryan Johnson's Blueprint and Peter Attia's clinic surface as personality-attached brands.
Menopause & Women's Health
VC-backed telehealth clinics own the answer layer. Three brands — Midi, Alloy, Evernow — account for ~22% combined. A category that did not exist five years ago.
Mental Health & Therapy
BetterHelp and Talkspace dominate — 23% combined. Workplace platforms are commercially enormous but nearly invisible in consumer-prompt citation.
Cannabis
MSOs anchor brand citation but share is depressed vs commercial scale by category structural constraints. Cookies and Stiiizy over-index culturally.
EV & Electric Vehicles
Tesla alone accounts for ~18% — more than the next three brands combined. Charging infrastructure brands are nearly absent. The Korean trio over-indexes.
Pickleball
Youngest category in the series. No brand has built a real moat. A two-year window remains to anchor Tier 1. The first-mover opportunity is real.
Watches & Horology
Rolex anchors ~21% — the largest single-brand citation in the series. Microbrands are commercially real but nearly invisible in AI citation. Apple Watch under-cited.
The framework, applied identically across all nine categories.
Each volume follows the same structure — same 25-brand depth, same five-engine variation, same recoverable ground analysis, same 12-week 5W playbook. Reading any volume teaches the framework. Reading multiple volumes teaches the structural shape of the AI answer layer.
Six sections per volume
Executive Finding → Methodology → The Ranking (25 brands) → Tier 1 Deep Dive → Engine Variation → Recoverable Ground → The 5W Playbook (12-week phased plan) → Investment Ballpark.
The full AI answer layer
ChatGPT, Claude, Perplexity, Gemini, Google AI Overviews. Each volume scores each brand engine-by-engine because the engines do not return identical citations — strategy must be engine-aware.
Leader · Strong · Mid · Lagging
Brands are tiered by aggregate citation share with engine-by-engine variation factored in. Tier breaks reflect natural inflection points in the data, not arbitrary cutoffs.
Where the citation lifts sit
Each volume isolates 3–4 specific brands whose citation share materially trails their commercial scale, product quality, or brand recognition — and outlines the path to recovery in priority order.
The editorial layer: Everything-PR Citation Share Studies.
The 5W AI Visibility Index ranks brands. Everything-PR's matching Citation Share Studies series ranks the outlets the AI engines actually trust in each of the same nine categories — the publications, forums, and creator content that anchor the citation graph each brand needs to live inside.
Read both. The brand ranking tells you where you are. The outlet ranking tells you where to invest.
Read the EPR Citation Share Studies series →Want this audit run on your brand?
5W AI Communications runs the AI Visibility Index methodology for clients across every category in this series — and many that are not. Phase 1 scoping engagement available at fixed fee. Phase 2 builds programs that compound citation share over 12–24 months.
Contact 5W5W is the AI Communications Firm, building brand authority across the platforms where decisions now happen — ChatGPT, Claude, Perplexity, Gemini, and Google AI Overviews — alongside earned media, digital, and influencer channels. 5W combines public relations, digital marketing, Generative Engine Optimization (GEO), and proprietary AI visibility research to help clients measure and grow their presence in AI-driven buyer research. Founded in 2003, 5W is recognized as a Top U.S. PR Agency by O'Dwyer's, named Agency of the Year in the American Business Awards®, honored as a 2026 Top Place to Work in Communications by Ragan, and named to Digiday's WorkLife Employer of the Year list. 5W serves clients across B2C sectors — Beauty & Fashion, Consumer Brands, Entertainment, Food & Beverage, Health & Wellness, Travel & Hospitality, Technology, and Nonprofit — and B2B specialties including Corporate Communications, Reputation Management, Public Affairs, Crisis Communications, and Digital Marketing across Social, Influencer, Paid Media, GEO, and SEO. Learn more at 5wpr.com.